Perhaps you should try some spelling variations:
u.s communication » u.s communications, 2.3 communication, 3.2 communication
u.s developpement » u.s development, un developpement, des developpements
information need » information needs, information needed, information speed
developpement de » developpement des, developpement durable
need life » needs life, need fide, need le
de africa » does africa, de america, use africa
life u.s » life 2.1, life 2.4, life 3.1
a u.s » _ u.s

You may be able to get more results by adjusting your search query.

• Adding a wildcard symbol may retrieve word variants: technology _ information need life u.s communication a u.s developpement de africa.*.